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If the mains voltage is switched on and
the controller still does not function or
display anything, then the internal device
fuse may be defective. In that case, disco-
nnect the device, open it, remove the old
fuse and check it. If it is defective, replace
it with a new one, locate the external sou-
rce of the error (e.g. pump) and replace
it. Then first re-commission the contro-
ller and check the function of the switch
outputs in manual mode as described in
Chap. 3.2.
Fuse
Malfunctions, additional info
Z.2 Replacing the fuse
Z.2.1
Danger
Danger
Repairs and maintenance may only be performed by a specialist. Before
working on the unit, switch off the power supply and secure it against
being switched on again! Check for the absence of power!
Only use the supplied spare fuse or a fuse of the same design with the
following specifications: T2A 250V.